Fuck the Duck or Fucking the duck is the act of being lazy. You are supposed to be doing something but instead you're "fucking the duck". If you are being really lazy it's called Fucking the Royal Duck.

"I thought Bill was going to help clean up theses leaves?" "No, he went to go fuck the duck."

"Hey, where's the cook? I have an order up, 2 cheeseburger specials!!" "he's out back fucking the royal duck".